4 ms·

Would you say more about the double points idea? Our Coway is struggling to filter our small apartment just recirculating air. It would be amazing to be able to

by gkop 6y ago

Would you say more about the double points idea? Our Coway is struggling to filter our small apartment just recirculating air. It would be amazing to be able to bring in filtered cool outside air, but I haven’t found any HEPA purifiers on the market with an intake hose or window mount (short of a permanent HVAC).

lacker 6y ago
How exactly is your Coway struggling? Typically it is harder for a filter to clean the air in your apartment when you are bringing in extra outside air. If you have a good filter but it is not managing to clean the air in your apartment, the most likely problems are that your apartment is too large for the filter's capacity, or that your apartment leaks air in from outside so that your filter can't counteract the effects of the leaking.
- gkop 6y ago
  Yes, apartment too large and poorly sealed. > Typically it is harder for a filter to clean the air in your apartment when you are bringing in extra outside air That was my point. Bringing in outside air would be a luxury. Btw just ordered passive filters for the windows for super cheap- perhaps that will move the needle on how much outside air we can bring in while maintaining indoor AQI. Still curious about the positive pressure idea. If it’s effective, I’d expect someone to productize it.
jrockway 6y ago
IQAir sells kits for directing the intake or output of their air filters to a vent. It's super expensive and obviously aimed at commercial customers, but I'm sure they'll sell it to you.
Scoundreller 6y ago
Take HEPA equipped vacuum cleaner. Put nozzle outside to suck in outside air. Put main unit inside to exhaust filtered air inside. Seal window crack however which way you can. Tape and a block of wood with a 3” circular hole? Voilà. Might be a good idea to pre-filter nozzle air to keep your HEPA for the small stuff. And have a good stock of replacement vacuum filters. And earplugs... Energy auditors will install a “fan door” to build pressure inside your home to smoke-test for air leaks. This is the same concept, except filtering the incoming air and helping to ensure your air-leaks are 1-way: out. But this is all no competition for a stiff wind.
- gkop 6y ago
  Earplugs! Good call.

by gkop 6y ago

lacker 6y ago

How exactly is your Coway struggling? Typically it is harder for a filter to clean the air in your apartment when you are bringing in extra outside air. If you have a good filter but it is not managing to clean the air in your apartment, the most likely problems are that your apartment is too large for the filter's capacity, or that your apartment leaks air in from outside so that your filter can't counteract the effects of the leaking.

gkop 6y ago
Yes, apartment too large and poorly sealed. > Typically it is harder for a filter to clean the air in your apartment when you are bringing in extra outside air That was my point. Bringing in outside air would be a luxury. Btw just ordered passive filters for the windows for super cheap- perhaps that will move the needle on how much outside air we can bring in while maintaining indoor AQI. Still curious about the positive pressure idea. If it’s effective, I’d expect someone to productize it.

jrockway 6y ago

IQAir sells kits for directing the intake or output of their air filters to a vent. It's super expensive and obviously aimed at commercial customers, but I'm sure they'll sell it to you.

Scoundreller 6y ago

Take HEPA equipped vacuum cleaner. Put nozzle outside to suck in outside air. Put main unit inside to exhaust filtered air inside. Seal window crack however which way you can. Tape and a block of wood with a 3” circular hole? Voilà. Might be a good idea to pre-filter nozzle air to keep your HEPA for the small stuff. And have a good stock of replacement vacuum filters. And earplugs... Energy auditors will install a “fan door” to build pressure inside your home to smoke-test for air leaks. This is the same concept, except filtering the incoming air and helping to ensure your air-leaks are 1-way: out. But this is all no competition for a stiff wind.

gkop 6y ago
Earplugs! Good call.